If `sintheta=(-4)/(5) and theta` lies in third quadrant, then the value of `cos""(theta)/(2)` is

If sintheta=(-4)/(5)andtheta lies in third quadrant, then the value of cos""(theta)/(2) is

If sin theta=-(4)/(5) and theta lies in third quadrant, then the value of cos((theta)/(2)) is

If "sin"theta=-4/(5) and theta lies in third quadrant, then the value of "cos"theta/(2) is

If sin theta = - (3)/(5) and theta lies in the third quadrant, then the value of cos (theta//2) is

If sin theta =-4/5 and theta lies in third quadrant, then the value of cos (theta/2) is ............... A) (1)/(sqrt5) B) -(1)/(sqrt5) C) sqrt((2)/(5)) D) -sqrt((2)/(5))

If sin theta=-(4)/(5) and theta lies in 3 quadrant then the value of cos ((theta)/(2)) is

If sintheta=(-4)/5 and theta lies in the third quadrant, then cos(theta/2) =

If sintheta=(-4)/(5)andtheta lies in third quadrant then "cos"(theta)/(2) =